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132f44dce1
Annotate object init/fini routines to detect use-after-free for on-stack/embedded objects.
119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2005 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is Red Hat, Inc.
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*
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* Contributor(s):
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* Carl D. Worth <cworth@cworth.org>
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*/
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#include "cairoint.h"
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/**
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* cairo_debug_reset_static_data:
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*
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* Resets all static data within cairo to its original state,
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* (ie. identical to the state at the time of program invocation). For
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* example, all caches within cairo will be flushed empty.
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*
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* This function is intended to be useful when using memory-checking
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* tools such as valgrind. When valgrind's memcheck analyzes a
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* cairo-using program without a call to cairo_debug_reset_static_data(),
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* it will report all data reachable via cairo's static objects as
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* "still reachable". Calling cairo_debug_reset_static_data() just prior
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* to program termination will make it easier to get squeaky clean
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* reports from valgrind.
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*
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* WARNING: It is only safe to call this function when there are no
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* active cairo objects remaining, (ie. the appropriate destroy
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* functions have been called as necessary). If there are active cairo
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* objects, this call is likely to cause a crash, (eg. an assertion
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* failure due to a hash table being destroyed when non-empty).
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**/
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void
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cairo_debug_reset_static_data (void)
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{
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CAIRO_MUTEX_INITIALIZE ();
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_cairo_scaled_font_map_destroy ();
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_cairo_toy_font_face_reset_static_data ();
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#if CAIRO_HAS_FT_FONT
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_cairo_ft_font_reset_static_data ();
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#endif
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_cairo_intern_string_reset_static_data ();
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_cairo_scaled_font_reset_static_data ();
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_cairo_pattern_reset_static_data ();
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CAIRO_MUTEX_FINALIZE ();
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}
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#if HAVE_VALGRIND
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void
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_cairo_debug_check_image_surface_is_defined (const cairo_surface_t *surface)
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{
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const cairo_image_surface_t *image = (cairo_image_surface_t *) surface;
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const uint8_t *bits;
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int row, width;
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if (surface == NULL)
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return;
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if (! RUNNING_ON_VALGRIND)
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return;
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bits = image->data;
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switch (image->format) {
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case CAIRO_FORMAT_A1:
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width = (image->width + 7)/8;
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break;
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case CAIRO_FORMAT_A8:
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width = image->width;
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break;
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case CAIRO_FORMAT_RGB24:
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case CAIRO_FORMAT_ARGB32:
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width = image->width*4;
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break;
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default:
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/* XXX compute width from pixman bpp */
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return;
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}
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for (row = 0; row < image->height; row++) {
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VALGRIND_CHECK_MEM_IS_DEFINED (bits, width);
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/* and then silence any future valgrind warnings */
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VALGRIND_MAKE_MEM_DEFINED (bits, width);
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bits += image->stride;
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}
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}
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#endif
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